Under Armour Seamless Run Tank Women's Running Apparel Black : Combining soft fabric and seamless construction, the Under Armour Seamless Run Tank provides ventilation and comfort. Soft knit fabric with engineered mesh ventilation, mapped to the places you need it most Nearly sew free construction to eliminate chafing Four-way stretch construction moves better in every direction Material wicks sweat & dries really fast Anti odor technology prevents the growth of odor causing microbes